It depends on what the smell is. If it is sewer gas, then it could be coming from the vent which is connected to the rest of the plumbing system.If it is something else then you have to determine what is causing it before you can correct it.

: we moved in may every thing in the home was redone , now theres a fowl smell coming from the sump pump ...do we need a new one or how do i stop this problem? the vent goes into my living room